TIPS : For have the better result, please follow this some rule
1/ Be sure you have enought Space for Download the App (200 Mo)+
2/ Be sure you don’t run too many app at the same time for have 500 RAM available.
3/ If you have a double vision issue please scan a QR Code here : http://www.hypergridbusiness.com/faq/vr-headset-qr-codes/
4/ For samsung Gear VR please donwload this app before : https://play.google.com/store/apps/details?id=com.kunkunsoft.cardboardappforgearvr